Display apparatus

ABSTRACT

A display apparatus comprises a display panel. The display panel emits a green light having a green energy and a green point of the CIE 1931 xy chromaticity under the operation of the highest gray level of a green image, and emits a blue light having a blue energy and a blue point of the CIE 1931 xy chromaticity under the operation of the highest gray level of a blue image. The ratio of the green energy to the blue energy is between 0.7 and 1.2. In the CIE 1931 chromaticity diagram, the coordinates of the blue point are bounded by the equation: y=−168.72x 2 +50.312x−3.635 and the equation: y=−168.72x 2 +63.81x−5.9174, while y is between 0.04 and 0.08.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. Ser. No.13/964,515, filed Aug. 12, 2013, which claims priority under 35 U.S.C.§119(a) on Patent Application No(s). 101132754, filed in Taiwan,Republic of China on Sep. 7, 2012, the entire contents of which arehereby incorporated by reference.

BACKGROUND

1. Technical Field

The disclosed embodiments relate to a display apparatus and, inparticular, to a display apparatus and a manufacturing method thereof.

2. Related Art

Because the current display apparatuses (e.g. LCD apparatuses) haveadvantages such as low power consumption, light weight and lessradiation, they are gradually taking the place of cathode ray tube (CRT)display apparatuses and widely applied to various electronic products.

For the design of a display apparatus, color taste is an importantdesign factor and it can be shown by the chromaticity diagram. Forexample, the light emitted from a display panel can be specificallyrepresented by a CIE 1931 xy chromaticity diagram, in which threeprimary colors (blue, green and red) have their respective color points,i.e. three vertices of the color triangle in the diagram. Presently,sRGB is commonly used as a chromaticity standard. Based on sRGB colorspace, in the CIE 1931 xy chromaticity diagram, the blue point isspecified as (0.15, 0.06), the green point is specified as (0.3, 0.6),and the red point is specified as (0.64, 0.33), in coordinates (x, y).If the color points of three primary colors of a light deviate from thecolor points defined by the sRGB standard too much, the colors displayedby the display panel may be distorted, so that the displayed images lossquality.

Therefore, it is an important subject to provide a display apparatus sothat the color points of primary colors of the light emitted by thedisplay apparatus can be maintained within a better range in thechromaticity diagram for enhancing the display quality and productcompetitiveness.

SUMMARY

In view of the foregoing subject, an objective of this disclosure is toprovide a display apparatus and a manufacturing method thereof so thatthe color points of primary colors of the light emitted by the displayapparatus can be maintained within a better range in the chromaticitydiagram for enhancing the display quality and product competitiveness.

To achieve the above objective, a display apparatus according to theembodiments of this disclosure comprises a display panel. The displaypanel emits a green light having a green energy and a green point of theCIE 1931 xy chromaticity under the operation of the highest gray levelof a green image, and emits a blue light having a blue energy and a bluepoint of the CIE 1931 xy chromaticity under the operation of the highestgray level of a blue image. The ratio of the green energy to the blueenergy is between 0.7 and 1.2, and the coordinates of the blue point inthe CIE 1931 xy chromaticity diagram are bounded by the equation:y=−168.72x²+50.312x−3.635 and the equation: y=−168.72x²+63.81x−5.9174,while the y is between 0.04 and 0.08.

In one embodiment, the coordinates of the green point in thechromaticity diagram are bounded by the equation:y=−48.85x²+22.964x−2.0014 and the equation: y=−48.85x²+26.872x−2.9981,while the y is between 0.58 and 0.64.

In one embodiment, the coordinates of the green point in thechromaticity diagram are bounded by the equation:y=−48.85x²+22.964x−2.0014 and the equation: y=−48.85x²+26.872x−2.9981,while the y is between 0.64 and 0.7.

In one embodiment, the ratio of the green energy to the blue energy isfurther between 0.8 and 1.1.

In one embodiment, the display panel emits a red light having a redenergy and a red point of the CIE 1931 xy chromaticity under theoperation of the highest gray level of a red image, and the ratio of thered energy to the blue energy is between 0.49 and 0.75.

In one embodiment, the ratio of the red energy to the blue energy isfurther between 0.5 and 0.7.

In one embodiment, the coordinates of the red point in the chromaticitydiagram are bounded by the equation: y=−2.021x²+2.1871x−0.2218 and theequation: y=−2.021x²+2.1871x−0.2618, while the x is between 0.62 and0.66.

In one embodiment, the coordinates of the red point in the chromaticitydiagram are bounded by the equation: y=−2.021x²+2.1871x−0.2218 and theequation: y=−2.021x²+2.1871x−0.2618, while the x is between 0.66 and0.68.

In one embodiment, the display panel is a liquid crystal display panel,a quantum dot display panel or an organic light-emitting diode displaypanel.

In one embodiment, the OLED display panel includes a substrate and alight-emitting layer, which is disposed on the substrate and includes aplurality of red light-emitting portions, a plurality of greenlight-emitting portions and a plurality of blue light-emitting portions.

In one embodiment, the OLED display panel includes a substrate, alight-emitting layer and a filter layer, the light-emitting layer isdisposed on the substrate and emits white light, and the filter layer isdisposed on the light-emitting layer and includes a plurality of redfilter portions, a plurality of green filter portions and a plurality ofblue filter portions.

In one embodiment, the green energy is corresponding to an integral areaof a green spectrum of the light, and the blue energy is correspondingto an integral area of a blue spectrum of the light.

In one embodiment, the red energy is corresponding to an integral areaof a red spectrum of the light.

To achieve the above objective, a manufacturing method of a displayapparatus according to the embodiments of this disclosure comprisessteps of: forming a display panel, wherein the display panel emits agreen light having a green energy and a green point of the CIE 1931 xychromaticity under the operation of the highest gray level of a greenimage, and emits a blue light having a blue energy and a blue point ofthe CIE 1931 xy chromaticity under the operation of the highest graylevel of a blue image; and adjusting the ratio of the green energy tothe blue energy as between 0.7 and 1.2, wherein the coordinates of theblue point in the CIE 1931 xy chromaticity diagram are bounded by theequation: y=−168.72x²+50.312x−3.635 and the equation:y=−168.72x²+63.81x−5.9174, while the y is between 0.04 and 0.08.

As mentioned above, in the display apparatus and the manufacturingmethod thereof, under the operations of the highest gray level of agreen and a blue image respectively, the ratio of the green energy tothe blue energy of the light is limited as between 0.7 and 1.2, and thecoordinates of the blue point in the CIE 1931 xy chromaticity diagramare bounded by the equation: y=−168.72x²+50.312x−3.635 and the equation:y=−168.72x²+63.81x−5.9174, while the y is between 0.04 and 0.08. Sincesuch color point is located within a better range, the display qualityof the display apparatus of this disclosure is enhanced a lot.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will become more fully understood from the detaileddescription and accompanying drawings, which are given for illustrationonly, and thus are not limitative of the present invention, and wherein:

FIG. 1 is a schematic diagram of an intensity spectrum of the lightemitted from a display panel according to an embodiment of thisdisclosure;

FIG. 2 is a CIE 1931 xy chromaticity diagram corresponding to the lightemitted from a display panel according to an embodiment of thisdisclosure;

FIG. 3 is a schematic diagram of a display panel being a liquid crystaldisplay (LCD) panel according to an embodiment of this disclosure;

FIG. 4 is a schematic diagram of a display panel being a quantum dotdisplay panel according to an embodiment of this disclosure;

FIG. 5 is a schematic diagram of a display panel being an OLED displaypanel according to an embodiment of this disclosure; and

FIG. 6 is a flow chart of a manufacturing method of a display apparatusaccording to an embodiment of this disclosure.

DETAILED DESCRIPTION

The present invention will be apparent from the following detaileddescription, which proceeds with reference to the accompanying drawings,wherein the same references relate to the same elements.

The display apparatus in this disclosure is not limited in type, and itcan be a liquid crystal display (LCD) apparatus, a quantum dot displayapparatus, or an organic light-emitting diode (OLED) display apparatusfor example.

In an embodiment of this disclosure, the display apparatus includes adisplay panel, which can be a liquid crystal display (LCD) panel, aquantum dot display panel, or an organic light-emitting diode (OLED)display panel for example. The display panel emits a green light havinga green energy and a green point of the CIE 1931 xy chromaticity underthe operation of the highest gray level (such as 255th gray level for an8-bit color level) of a green image, and emits a blue light having ablue energy and a blue point of the CIE 1931 xy chromaticity under theoperation of the highest gray level (such as 255th gray level for an8-bit color level) of a blue image. The ratio of the green energy to theblue energy is between 0.7 and 1.2. FIG. 1 is a schematic diagram of anintensity spectrum (the unit of the intensity of the y coordinate isarbitrary) of the light emitted from the display panel. The intensityspectrum includes a green spectrum, a blue spectrum and a red spectrum.Herein, the green spectrum is obtained when the display panel onlydisplays the image of the highest gray level of green (e.g. 255th graylevel), the red spectrum is obtained when the display panel onlydisplays the image of the highest gray level of red (e.g. 255th graylevel), and the blue spectrum is obtained when the display panel onlydisplays the image of the highest gray level of blue (e.g. 255th graylevel). Here, the green energy is corresponding to an integral area ofthe green spectrum (i.e. the area under the curve representing the greenspectrum), and the blue energy is corresponding to an integral area ofthe blue spectrum (i.e. the area under the curve representing the bluespectrum). Moreover, when the design requirement is much closer to thesRGB standard, the better case is that the ratio of the green energy ofthe light to the blue energy of the light is between 0.8 and 1.1, andtherefore the blue point and the green point in the CIE 1931 xychromaticity diagram will be closer to the defined color points of thesRGB standard.

FIG. 2 is a CIE 1931 xy chromaticity diagram corresponding to the lightemitted from the display panel according to this embodiment. When theenergy of the light emitted from the display panel under the operationof the highest gray level (such as 255th gray level) is in conformitywith the above-mentioned condition, the coordinates (x, y) of the bluepoint in the chromaticity diagram are bounded by the equation:y=−168.72x²+50.312x−3.635 (equation A in FIG. 2) and the equation:y=−168.72x²+63.81x−5.9174 (equation B in FIG. 2), while the y is between0.04 and 0.08. Thereby, the display quality and color taste of thedisplay panel can be enhanced.

Furthermore, when the energy of the light emitted from the display panelunder the operation of the highest gray level (such as 255th gray level)is in conformity with the above-mentioned condition, the coordinates (x,y) of the green point in the chromaticity diagram are bounded by theequation: y=−48.85x²+22.964x−2.0014 (equation C in FIG. 2) and theequation: y=−48.85x²+26.872x−2.9981 (equation D in FIG. 2), while the yis between 0.58 and 0.64. Besides, in consideration of a case of highcolor gamut with NTSC greater than or equal to 80% wherein the colorsaturation is higher and each single color is more vivid, the ycoordinate of the green point can be specified as between 0.64 and 0.7.

By referring to FIG. 1 again, when the display panel emits a red lighthaving a red energy and a red point of the CIE 1931 xy chromaticityunder the operation of the highest gray level (such as 255th gray level)of a red image, the ratio of the red energy to the blue energy can bedesigned as between 0.49 and 0.75. The red energy is corresponding to anintegral area of the red spectrum in FIG. 1 (i.e. the area under thecurve representing the red spectrum). Besides, when the designrequirement is much closer to the sRGB standard, a better case is thatthe ratio of the red energy of the light to the blue energy of the lightis between 0.5 and 0.7, and therefore the blue point and the red pointin the CIE 1931 xy chromaticity diagram will be closer to the definedcolor points of the sRGB standard.

Accordingly, as shown in FIG. 2, when the energy of the light emittedfrom the display panel under the operation of the highest gray level(such as 255th gray level) is in conformity with the above-mentionedcondition, the coordinates (x, y) of the red point in the chromaticitydiagram are bounded by the equation: y=−2.021x²+2.1871x−0.2218 (equationE in FIG. 2) and the equation: y=−2.021x²+2.1871x−0.2618 (equation F inFIG. 2), while the x is between 0.62 and 0.66. Thereby, the displayquality and color taste of the display panel can be enhanced. Besides,in consideration of a case of high color gamut with NTSC greater than orequal to 80%, the x coordinate of the red point can be specified asbetween 0.66 and 0.68. To be noted, the condition of the ratio of thegreen energy to the blue energy and the condition of the ratio of thered energy to the blue energy can be effective separately or together.

In the embodiments of this disclosure, the display panel can havevariations, and some of them are illustrated as below for example.

FIG. 3 is a schematic diagram of a display panel 1 being a liquidcrystal display (LCD) panel according to an embodiment of thisdisclosure. The display panel 1 includes a first substrate 11, a secondsubstrate 12, and a liquid crystal layer 13. The first substrate 11 is athin film transistor (TFT) substrate, and the second substrate 12 is acolor filter substrate, for example. The liquid crystal layer 13 isdisposed between the first substrate 11 and the second substrate 12.Each of the first and second substrates 11 and 12 can be a glasssubstrate, a transparent acrylic substrate or a flexible substrate, andalso can be a touch substrate. As an embodiment, the second substrate 12includes a color filter layer 121, which includes a blue filter portion,a green filter portion and a red filter portion. When the light emittedby the backlight module of the LCD apparatus passes through the bluefilter portion, the blue energy of the light out of the display panel 1is formed and can be shown by the blue spectrum of the light. When thelight emitted by the backlight module of the LCD apparatus passesthrough the green filter portion, the green energy of the light of thedisplay panel 1 is achieved and can be represented by the green spectrumof the light. When the light emitted by the backlight module of the LCDapparatus passes through the red filter portion, the red energy of thelight of the display panel 1 is achieved and can be represented by thered spectrum of the light.

The blue energy, green energy and red energy of the display panel can becalculated as follows:

For the blue energy, B=∫₃₈₀ ⁷⁸⁰BLU(λ)*BCF(λ)*CELL(λ)dλ

For the green energy, G=∫₃₈₀ ⁷⁸⁰BLU(λ)*GCF(λ)*CELL(λ)dλ

For the red energy, R=∫₃₈₀ ⁷⁸⁰BLU(λ)*RCF(λ)*CELL(λ)dλ

BLU(λ) denotes the energy distribution spectrum of the backlight module.BCF(λ) denotes the transmission spectrum of the blue filter portion,GCF(λ) denotes the transmission spectrum of the green filter portion,and RCF(λ) denotes the transmission spectrum of the red filter portion.CELL(λ) denotes the liquid crystal transmission spectrum of the displaypanel excluding the color filter (CF) layer, and λ denotes wavelength.The numbers of 380 and 780 denote the wavelength range of the integralcalculation with the unit of “nm”, and the unit of the integral of theblue energy, green energy and red energy is light watt. It can be seenfrom the calculations that the energy of each color can be adjusted bychanging BLU(λ), CF(λ) (including BCF(λ), GCF(λ), RCF(λ)) or CELL(λ).

Since the energy can be adjusted by designing the transmission spectrumCF(λ) of the filter portions, the energy can be adjusted by changing thematerial type of filter portions (e.g. R254, R177, G7, G36, G58, Y150,Y138, Y139, B15:6, etc.) and their weight percentages. For example, thepeak wavelength of the transmission spectrum of the blue filter portionis specified as between 440 nm and 470 nm, the peak wavelength of thetransmission spectrum of the green filter portion is specified asbetween 500 nm and 550 nm, and under the operations of the highest graylevel of a green and a blue image respectively, the ratio of the greenenergy to the blue energy is specified as between 0.7 and 1.2.Therefore, the coordinates (x, y) of the blue point in the CIE 1931 xychromaticity diagram are bounded by the equation:y=−168.72x²+50.312x−3.635 (equation A in FIG. 2) and the equation:y=−168.72x²+63.81x−5.9174 (equation B in FIG. 2), while the y is between0.04 and 0.08. Besides, the coordinates (x, y) of the green point in thechromaticity diagram are bounded by the equation:y=−48.85x²+22.964x−2.0014 (equation C in FIG. 2) and the equation:y=−48.85x²+26.872x−2.9981 (equation D in FIG. 2), while the y is between0.58 and 0.64.

When the design requirement is much closer to the sRGB standard, thebetter case is that the ratio of the green energy of the light to theblue energy of the light is between 0.8 and 1.1. Besides, inconsideration of a case of high color gamut with NTSC greater than orequal to 80% wherein the color saturation is higher and each singlecolor is more vivid, the y coordinate of the green point can bespecified as between 0.64 and 0.7 while the ratio of the green energy tothe blue energy is in conformity with the above-mentioned condition.

Besides, the ratio of the red energy to the blue energy can be adjustedas between 0.49 and 0.75, so that the coordinates (x, y) of the redpoint in the chromaticity diagram are bounded by the equation:y=−2.021x²+2.1871x−0.2218 (equation E in FIG. 2) and the equation:y=−2.021x²+2.1871x−0.2618 (equation F in FIG. 2), while the x is between0.62 and 0.66. Besides, when the design requirement is much closer tothe sRGB standard, a better case is that the ratio of the red energy tothe blue energy is between 0.5 and 0.7. If the application of high colorgamut is considered, the x coordinate of the red point can be specifiedas between 0.66 and 0.68.

Otherwise, the energy ratio can be adjusted by designing BLU(λ) of thebacklight module. For example, when blue LEDs cooperate with red andgreen phosphor powders to bring about a spectrum in the backlightmodule, the material type or weight percentage of the phosphor powdersor the current of the backlight module can be changed, so that the peakwavelength of the blue light is approximately between 440 nm and 470 nm,the peak wavelength of the transmission spectrum of the green phosphorpowder is between 500 nm and 550 nm, and the peak wavelength of thetransmission spectrum of the red phosphor powder is between 600 nm and660 nm. As another example, when blue LEDs cooperate with yellowphosphor powder in the backlight module, the material type or weightpercentage of the phosphor powder or the current of the backlight modulecan be changed, so that the peak wavelength of the blue light isapproximately between 440 nm and 470 nm, the peak wavelength of thetransmission spectrum of the yellow phosphor powder is between 550 nmand 570 nm. According to the above-mentioned cases, the ratio of the redenergy to the blue energy, under the operations of the highest graylevel of a red and a blue image respectively, can be adjusted, so thatthe coordinates of the color points in the chromaticity diagram are inconformity with the above-mentioned design conditions. The adjustment ofthe ratio of the green energy to the blue energy can be conductedsimilarly, and therefore it is not described here for concise purpose.

Otherwise, CELL(λ) of the liquid crystal transmission spectrum can beadjusted to change and make the energy ratio in conformity with theabove-mentioned design conditions, and the related description isomitted here for concise purpose.

The display panel 1 can have variations by different technologies. Forexample, the color filter layer is disposed to the TFT array (i.e. colorfilter on array, COA), or the TFT array is disposed to the color filtersubstrate (i.e. TFT on CF, TOC or array on CF). The first substrate 11and the second substrate 12 each can be a transparent acrylic substrateor a flexible substrate. Accordingly, the related green energy and blueenergy, or the related red energy and blue energy can be designed inconformity with the above-mentioned conditions so that the coordinatesof the color points in the chromaticity diagram can be located withinthe required range.

FIG. 5 is a schematic diagram of a display panel 3 being an OLED displaypanel according to an embodiment of this disclosure. The display panel 3includes a substrate 31, a light-emitting layer 32 and a filter layer33. The light-emitting layer 32 emits white light. The filter layer 33includes a plurality of red filter portions 331, a plurality of greenfilter portions 332 and a plurality of blue filter portions 333. Thesubstrate 31 and the opposite substrate (not shown) each can be a glasssubstrate, a transparent acrylic substrate or a flexible substrate, andalso can be a touch substrate. The substrate 31 and the oppositesubstrate can be covered by a protection film. In this embodiment, whenthe white light emitted by the light-emitting layer 32 passes throughthe red filter portions 331, the red energy of the light out of thedisplay panel 3 is formed and can be shown by the red spectrum of thelight. When the white light emitted by the light-emitting layer 32passes through the green filter portions 332, the green energy of thelight out of the display panel 3 is formed and can be shown by the greenspectrum of the light. When the white light emitted by thelight-emitting layer 32 passes through the blue filter portions 333, theblue energy of the light out of the display panel 3 is formed and can beshown by the blue spectrum of the light. Herein, the red spectrum isobtained when the display panel only displays the image of the highestgray level of red (e.g. 255th gray level), the green spectrum isobtained when the display panel only displays the image of the highestgray level of green (e.g. 255th gray level), and the blue spectrum isobtained when the display panel only displays the image of the highestgray level of blue (e.g. 255th gray level).

In this embodiment, the color energy can be adjusted by designing thefilter layer or the light-emitting layer, so that the ratio of the greenenergy to the blue energy or the ratio of the red energy to the blueenergy is adjusted in conformity with the above-mentioned designconditions. For example, the material type of filter layer (e.g. R254,R177, G7, G36, G58, Y150, Y138, Y139, B15:6, etc.) and the weightpercentage thereof can be designed. For example, the peak wavelength ofthe transmission spectrum of the blue filter portion is specified asbetween 440 nm and 470 nm, the peak wavelength of the transmissionspectrum of the green filter portion is specified as between 500 nm and550 nm, and under the operations of the highest gray level of a greenand a blue image respectively, the ratio of the green energy to the blueenergy is specified as between 0.7 and 1.2. Therefore, the coordinates(x, y) of the blue point in the CIE 1931 xy chromaticity diagram arebounded by the equation: y=−168.72x²+50.312x−3.635 (equation A in FIG.2) and the equation: y=−168.72x²+63.81x−5.9174 (equation B in FIG. 2),while the y is between 0.04 and 0.08. Besides, the coordinates (x, y) ofthe green point in the chromaticity diagram are bounded by the equation:y=−48.85x²+22.964x−2.0014 (equation C in FIG. 2) and the equation:y=−48.85x²+26.872x−2.9981 (equation D in FIG. 2), while the y is between0.58 and 0.64. Preferably, the ratio of the green energy to the blueenergy is between 0.8 and 1.1. Besides, in consideration of a case ofhigh color gamut with NTSC greater than or equal to 80% wherein thecolor saturation is higher and each single color is more vivid, the ycoordinate of the green point can be specified as between 0.64 and 0.7while the ratio of the green energy to the blue energy is in conformitywith the above-mentioned condition.

Otherwise, the material or weight percentage of the light-emitting layercan be designed, or the current inputted to the light-emitting layer canbe designed, so that the peak wavelength of the blue portion of theintensity spectrum of the light-emitting layer is between 440 nm and 470nm, the peak wavelength of the green portion is between 500 nm and 550nm, the wavelength of the red portion is between 600 nm and 660 nm, andthe ratio of the red energy to the blue energy is between 0.49 and 0.75.Therefore, the coordinates (x, y) of the red point in the chromaticitydiagram are bounded by the equation: y=−2.021x²+2.1871 x−0.2218(equation E in FIG. 2) and the equation: y=−2.021x²+2.1871 x−0.2618(equation F in FIG. 2), while the x is between 0.62 and 0.66. Besides,the coordinates of the blue point in the chromaticity diagram alsolocated within the required range, and they are not described here forconcise purpose. Besides, when the design requirement is much closer tothe sRGB standard, a better case is that the ratio of the red energy tothe blue energy is between 0.5 and 0.7. If the application of high colorgamut is considered, the x coordinate of the red point can be specifiedas between 0.66 and 0.68.

In the embodiment (not shown) of an OLED display panel emitting blue,green and red lights, the materials or weight percentages of thelight-emitting layers of the respective colors, or the current inputtedto the light-emitting layers can be designed, so that the peakwavelength of the blue portion of the intensity spectrum of thelight-emitting layer is between 440 nm and 470 nm, the peak wavelengthof the green portion is between 500 nm and 550 nm, the wavelength of thered portion is between 600 nm and 660 nm, and the ratio of the greenenergy to the blue energy or the ratio of the red energy to the blueenergy is adjusted. Therefore, the coordinates of the color points inthe chromaticity diagram can be located within the required range, andthe related descriptions are omitted here for concise purpose.

FIG. 4 is a schematic diagram of a display panel 2 being a quantum dotdisplay panel according to an embodiment of this disclosure. The displaypanel 2 includes a substrate 21 and a quantum dot light-emitting layer22. The quantum dot light-emitting layer 22 includes a plurality redportions R, a plurality of green portions G and a plurality of blueportions B, which are disposed by turns. The display panel furtherincludes an opposite substrate (not shown). The substrate 21 and theopposite substrate each can be a glass substrate, a transparent acrylicsubstrate or a flexible substrate, and also can be a touch substrate.The substrate 21 and the opposite substrate can be covered by aprotection film. In this case, the light emitted by the red portions Rbrings about the red energy of the light out of the display panel 2 andthe red energy can be shown by the red spectrum of the light, the lightemitted by the green portions G brings about the green energy of thelight out of the display panel 2 and the green energy can be shown bythe green spectrum of the light, and the light emitted by the blueportions B brings about the blue energy of the light out of the displaypanel 2 and the blue energy can be shown by the blue spectrum of thelight. Herein, the red spectrum is obtained when the display panel onlydisplays the image of the highest gray level of red (e.g. 255th graylevel), the green spectrum is obtained when the display panel onlydisplays the image of the highest gray level of green (e.g. 255th graylevel), and the blue spectrum is obtained when the display panel onlydisplays the image of the highest gray level of blue (e.g. 255th graylevel).

In this embodiment, the materials or weight percentages of the quantumdot light-emitting layer of the respective colors, or the currentinputted to the quantum dot light-emitting layer can be designed, sothat the peak wavelength of the blue portion of the intensity spectrumof the quantum dot light-emitting layer is between 440 nm and 470 nm,the peak wavelength of the green portion is between 500 nm and 550 nm,the wavelength of the red portion is between 600 nm and 660 nm, and theratio of the green energy to the blue energy or the ratio of the redenergy to the blue energy is adjusted. Therefore, the coordinates of thecolor points in the chromaticity diagram can be located within therequired range, and the related descriptions are omitted here forconcise purpose.

FIG. 6 is a flow chart of a manufacturing method of a display apparatusaccording to an embodiment of this disclosure. The manufacturing methodincludes the steps of forming a display panel, wherein the display panelemits a green light having a green energy and a green point of the CIE1931 xy chromaticity under the operation of the highest gray level of agreen image, and emits a blue light having a blue energy and a bluepoint of the CIE 1931 xy chromaticity under the operation of the highestgray level of a blue image (S01); and adjusting ratio of the greenenergy to the blue energy as between 0.7 and 1.2, wherein thecoordinates of the blue point (x, y) in the CIE 1931 xy chromaticitydiagram are bounded by the equation: y=−168.72x²+50.312x−3.635 and theequation: y=−168.72x²+63.81x−5.9174, while the y is between 0.04 and0.08 (S02). The display panel can be an LCD panel, a quantum dot displaypanel or an OLED display panel. Under the operations of the highest graylevel of a green and a blue image respectively, the ratio of the greenenergy to the blue energy can be further between 0.8 and 1.1. Under theoperations of the highest gray level of a red and a blue imagerespectively, the ratio of the red energy to the blue energy can bebetween 0.49 and 0.75. Under the operations of the highest gray level ofa red and a blue image respectively, the ratio of the red energy to theblue energy can be further between 0.5 and 0.7. The technical featuresof the manufacturing method of the display panel of this embodiment arealso clearly illustrated in the foregoing embodiments, and thereforethey are not described here for concise purpose.

In summary, in the display apparatus and the manufacturing methodthereof, under the operations of the highest gray level of a green and ablue image respectively, the ratio of the green energy to the blueenergy, or the ratio of the red energy to the blue energy is designed inconformity with the above-mentioned condition so that the color pointsin the chromaticity diagram can be located closer to the locationsdefined by the sRGB standard. Therefore, the display quality of thedisplay apparatus of this disclosure is enhanced a lot.

Although the invention has been described with reference to specificembodiments, this description is not meant to be construed in a limitingsense. Various modifications of the disclosed embodiments, as well asalternative embodiments, will be apparent to persons skilled in the art.It is, therefore, contemplated that the appended claims will cover allmodifications that fall within the true scope of the invention.

What is claimed is:
 1. A display apparatus, comprising: a display panel,emitting a green light having a green energy and a green point of theCIE 1931 xy chromaticity under the operation of the highest gray levelof a green image, wherein the coordinates of the green point in thechromaticity diagram are bounded by the equation:y=−48.85x²+22.964x−2.0014 and the equation: y=−48.85x²+26.872x−2.9981,while the y is between 0.64 and 0.7.
 2. The display apparatus as recitedin claim 1, wherein a slope of each of the equations is negative.
 3. Thedisplay apparatus as recited in claim 1, wherein the display panel emitsa blue light having a blue energy and a blue point of the CIE 1931 xychromaticity under the operation of the highest gray level of a blueimage, and the ratio of the green energy to the blue energy is between0.7 and 1.2, wherein the green energy is corresponding to an integralarea of a green spectrum of the light and the blue energy iscorresponding to an integral area of a blue spectrum of the light. 4.The display apparatus as recited in claim 1, wherein the display panelemits a blue light having a blue energy and a blue point of the CIE 1931xy chromaticity under the operation of the highest gray level of a blueimage, wherein the coordinates of the blue point in the CIE 1931 xychromaticity diagram are bounded by the equation:y=−168.72x²+50.312x−3.635 and the equation: y=−168.72x²+63.81x−5.9174,while the y is between 0.04 and 0.08.
 5. The display apparatus asrecited in claim 3, wherein the display panel emits a red light having ared energy and a red point of the CIE 1931 xy chromaticity under theoperation of the highest gray level of a red image, and the ratio of thered energy to the blue energy is between 0.49 and 0.75, the red energyis corresponding to an integral area of a red spectrum of the light. 6.The display apparatus as recited in claim 1, wherein the display panelis a liquid crystal display panel, a quantum dot display panel or anorganic light-emitting diode (OLED) display panel.
 7. A displayapparatus, comprising: a display panel, emitting a blue light having ablue energy and a blue point of the CIE 1931 xy chromaticity under theoperation of the highest gray level of a blue image, wherein thecoordinates of the blue point in the CIE 1931 xy chromaticity diagramare bounded by the equation: y=−168.72x²+50.312x−3.635 and the equation:y=−168.72x²+63.81x−5.9174, while the y is between 0.04 and 0.08 and aslope of each of the equations is positive.
 8. The display apparatus asrecited in claim 7, wherein the display panel emits a green light havinga green point of the CIE 1931 xy chromaticity under the operation of thehighest gray level of a green image, wherein a y value of thecoordinates of the green point in the chromaticity diagram is between0.64 and 0.7.
 9. The display apparatus as recited in claim 8, whereinthe coordinates of the green point in the chromaticity diagram arebounded by the equation: y=−48.85x²+22.964x−2.0014 and the equation:y=−48.85x²+26.872x−2.9981.
 10. The display apparatus as recited in claim7, wherein the display panel emits a green light having a green energyand a green point of the CIE 1931 xy chromaticity under the operation ofthe highest gray level of a green image, and the ratio of the greenenergy to the blue energy is between 0.7 and 1.2, wherein the greenenergy is corresponding to an integral area of a green spectrum of thelight and the blue energy is corresponding to an integral area of a bluespectrum of the light.
 11. The display apparatus as recited in claim 7,wherein the display panel emits a red light having a red energy and ared point of the CIE 1931 xy chromaticity under the operation of thehighest gray level of a red image, and the ratio of the red energy tothe blue energy is between 0.49 and 0.75, wherein the red energy iscorresponding to an integral area of a red spectrum of the light and theblue energy is corresponding to an integral area of a blue spectrum ofthe light.
 12. The display apparatus as recited in claim 11, wherein thecoordinates of the red point in the chromaticity diagram are bounded bythe equation: y=−2.021x²+2.1871x−0.2218 and the equation:y=−2.021x²+2.1871x−0.2618, while the x is between 0.62 and 0.66.
 13. Thedisplay apparatus as recited in claim 7, wherein the display panel is aliquid crystal display panel, a quantum dot display panel or an organiclight-emitting diode (OLED) display panel.
 14. A display apparatus,comprising: a display panel, emitting a green light having a greenenergy and a green point of the CIE 1931 xy chromaticity under theoperation of the highest gray level of a green image, and emitting ablue light having a blue energy and a blue point of the CIE 1931 xychromaticity under the operation of the highest gray level of a blueimage, wherein the ratio of the green energy to the blue energy isbetween 0.7 and 1.2.
 15. The display apparatus as recited in claim 14,wherein the green energy is corresponding to an integral area of a greenspectrum of the light and the blue energy is corresponding to anintegral area of a blue spectrum of the light.
 16. The display apparatusas recited in claim 14, wherein the display panel emits a red lighthaving a red energy and a red point of the CIE 1931 xy chromaticityunder the operation of the highest gray level of a red image, and theratio of the red energy to the blue energy is between 0.49 and 0.75. 17.The display apparatus as recited in claim 14, wherein a y value of thecoordinates of the green point in the chromaticity diagram is between0.64 and 0.7.
 18. The display apparatus as recited in claim 17, whereinthe coordinates of the green point in the chromaticity diagram arebounded by the equation: y=−48.85x²+22.964x−2.0014 and the equation:y=−48.85x²+26.872x−2.9981.
 19. The display apparatus as recited in claim18, wherein a slope of each of the equations is negative.
 20. Thedisplay apparatus as recited in claim 14, wherein the display panel is aliquid crystal display panel, a quantum dot display panel or an organiclight-emitting diode (OLED) display panel.